Keystones — Lintel
Five GCSE retrieval questions · 26 October 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 630,000 in standard form
Answer: 6.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 60
Answer: (x - 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 32.34cm -
4. Ratio Mixed ratio problems
£186.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £124.00 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 25, 50, 34, 48, what is the missing number?
Answer: 33